ULN2804A Overview
Octal High Voltage, High Current Darlington Transistor Arrays The eight NPN Darlington connected transistors in this family of arrays are ideally suited for interfacing between low logic level digital circuitry (such as TTL, CMOS or PMOS/NMOS) and the higher current/voltage requirements of lamps, relays, printer hammers or other similar loads for a broad range of puter, industrial, and consumer applications.

